alignment.h

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/******************************************************************************
The MIT License(MIT)

Embedded Template Library.

Copyright(c) 2014 jwellbelove

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#ifndef __ETL_ALIGNEMENT__
#define __ETL_ALIGNEMENT__

#include "type_traits.h"


#if !defined(COMPILER_IAR)

#if defined(COMPILER_MICROSOFT)
#define ETL_ALIGNMENT_PRE(n) __declspec(align(n))
#define ETL_ALIGNMENT_POST(n)
#endif

#if defined(COMPILER_GCC)
#define ETL_ALIGNMENT_PRE(n)
#define ETL_ALIGNMENT_POST(n) __attribute__((aligned(n)))
#endif

#if defined (COMPILER_KEIL)
#define ETL_ALIGNMENT_PRE(n)
#define ETL_ALIGNMENT_POST(n) __attribute__((aligned(n)))
#endif

namespace etl
{ 
  template <typename T, const size_t ALIGNMENT>
  struct align_at;
    
  template <typename T>
  struct align_at<T, 1>
  {
    ETL_ALIGNMENT_PRE(1) T value ETL_ALIGNMENT_POST(1);
  };

  template <typename T>
  struct align_at<T, 2>
  {
    ETL_ALIGNMENT_PRE(2) T value ETL_ALIGNMENT_POST(2);
  };

  template <typename T>
  struct align_at<T, 4>
  {
    ETL_ALIGNMENT_PRE(4) T value ETL_ALIGNMENT_POST(4);
  };

  template <typename T>
  struct align_at<T, 8>
  {
    ETL_ALIGNMENT_PRE(8) T value ETL_ALIGNMENT_POST(8);
  };

  template <typename T>
  struct align_at<T, 16>
  {
    ETL_ALIGNMENT_PRE(16) T value ETL_ALIGNMENT_POST(16);
  };
  
  template <typename TValue, typename TAlign>
  struct align_as : public align_at<TValue, etl::alignment_of<TAlign>::value>
  {
  };
}
#endif

#undef ETL_ALIGNMENT_PRE
#undef ETL_ALIGNMENT_POST

#endif